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        <title>CodeMirror: PEG.js Mode</title>
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            <h2>PEG.js Mode</h2>
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                <textarea id="code" name="code"> /* * Classic example grammar, which recognizes simple arithmetic expressions like * "2*(3+4)". The parser generated from this grammar then computes their value. */ start = additive additive = left:multiplicative "+" right:additive { return
                    left + right; } / multiplicative multiplicative = left:primary "*" right:multiplicative { return left * right; } / primary primary = integer / "(" additive:additive ")" { return additive; } integer "integer" = digits:[0-9]+ { return
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            <h3>The PEG.js Mode</h3>
            <p> Created by Forbes Lindesay.</p>
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